Given below are four methods (A - D) and their modes of action (a - d) in achieving contraception. Select their correct matching from the four options that follow:
| Method | Mode of Action | ||
|---|---|---|---|
| A. | The pill | a. | Prevents sperms reaching cervix |
| B. | Condom | b. | Prevents implantation |
| C. | Vasectomy | c. | Prevents ovulation |
| D. | Copper T | d. | Semen contains no sperms |
A-b, B-c, C-a, D-d
A-c, B-a, C-d, D-b
A-d, B-a, C-b, D-c
A-c, B-d, C-a, D-b